Differential gear for goniometric apparatus



Dec. 4 1923.

' A. CASTIGLIONI' DIFFERENTIAL GEAR FOR GONIOMETRIG APPARATUS.

Filed May 10 1919 Patented Dec. 4, 1923.

UNITE is;

ALDO CASTIGLIONI, OF HOME, ITALY.

DIFFERENTIAL GEAR FOR GONIOMETBJIG APPARATUS.

Application filed May 10, 1919. Serial No. 296,136.

To all whom it may concern:

Be it known that I, ALDO CAs'rIeLroNI, engineer, subject of the King of Italy, and residing at Rome, Italy (whose post-oflice address is Via Velletri 21, Rome), have invented certain new and useful Improvements in Differential Gears for Goniometric Apparatus, of which the following is a specification.

metric apparatus and particularly such apparatus when applied to panoramic telescopes-or similar sighting apparatus.

The object of the invention is to provide a means for adjusting the angle measuring apparatus an amount equal to the algebraic sum of two angles, for instance'in gun sighting apparatus, for the .basic angle and the angle of correction, the amount of each of these angles being indicated at any stage of the adjustment.

Another object of the invention is the provision of means for adjusting the angle measuring apparatus an amount equal to the algebraic sum of the two angles without necessitating any computation with respect to the amounts of the angles.

I accomplish these, and other objects which will be apparent as the description proceeds, by apparatus such as is illustrated in the accompanying drawings, in which Fig. 1 shows a diagrammatic view of the device after adjustment for the first angle; Fig. 2 shows a similar view of the'device after the adjustment. fora second angle;

Fig. 3 is a horizontal section through a panoramic telescope having the invention embodied therein; and

Fig. 4: is a view, partly in verticalvsection 40 of the apparatus illustrated in Fig. 3.

Referring to the diagrammatic'showings' of Figs. 1 and 2, A represents an adjustable scale ring on which is indicated a double scale, with which cooperate two pointers C and D, the former mounted on a fixed part of the apparatus and the latter onthe movable part. This scale is graduated to read in units of angular measurement. The scale ring A is manually operable to indi- 59 cate the units of angular measurement as transmitted by the observer to the operator; as shown in Fig. 1, the amount indicated is The present invention relates to gonio 4 units or an angular adjustment of 400 to the right of the 00 datum line The element provided with the scale E, which is marked with the fractional angular units, is operable to adjust the indicator C and also the movable part of the apparatus. In Fig. 1, the scale E shows a readingof 70 fractional units of adjustment to-the right of the angular adjustment of 400.

To make a second adjustment of the device, for example for the angle of correction, the scale ring A is again operated until it indicates relatively to the pointer C the angular units of the first adjustment, in the example shown the adjustment is 4 units. The scale B is then operated until the fractional units of the second adjustment are indicated thereon; the operation of the element carrying the scale B provides the second adjustment for the movable part of i the apparatus which carries the pointer D. In the position of the apparatus shown in Fig. 2, the amount ofthis second adjustment is '580 which is 180 fractional units to the left of the first adjustment of the angle measuring apparatus has been adthe apparatus to the left and the member carrying the scale B to adjust it to the right without affecting the principles involved in the operation of the device as a whole.

An embodiment of this device he panoramic telescope is illustrated in Figs. 3 aud t, in which the movable scale ring-A is provided with a double scale with which the pointer C, mounted on the fixed pant ofthe apparatus, and the pointer D mounted on the movable part of the apparatus, cooperate. Both the movable and the fiXed part of the apparatus are supported on a suitable base S. The movable part of the apparatus comprises the sight support 1, which is provided with gear teeth 2, which are engagedlby the worm screw 3-so that the movement of the latter in either a rotationalor axial direction will rotate the support 1, which carries the optical elements of the apparatus, r

The worm screw 3 is keyed to the shaft 3 so as to be rotatabletherewith or to slide thereon without rotation ;the worm shaft 3, and consequently the worm screw 3,.is rotated on its axis by means of the head 4, which is provided with the scale E5, rotation of the wormscrew 3 rotates the support 1, which is geared thereto, and also the sleeve 5 which carries the pointer C. The sleeve 5 is here shown as screwed to an .up-

, wardly' extending tubular memberfi carried "the example shown 'is'TO.

by the support 1.

The worm 'screw 3 is translated in an axial 'direction without rotation by the operation of the head 7 of the hollow screw 8, on which is also carried-the scale The axial movement of the screw 3 operates the clever 9, through themedi'um of the Ushaped sleeve member 10 which is slidably mounted on the worm shafi 3". The lever 9 carries-withit the ring 11, bearing the pointer D, whereby the fractional units ot the" angular adjustment are indicated.

Thefu'n'ctionof the'device will be readily understood from the foregoing description, and 1t Wlll be only necessary to recapitulate the several operations involved; The instrument. being set up with all of its scale members. in theirinitial-or zero position with the lineof sight on the datum line 0O, it is desired that it be adjusted to a position of 470 degreesto the left of this'datum line with a correction 015 580 degrees to the right of this first-position,

The scale ring A is first moved to indicate in connection with the indicator the 4 angular units or 400 degrees of the "first adjustment ,theworm screw dis then operated until the scale E indicatesthe amount or the "fractional units of adjustment which. in v This rotation of the worm screw 3 moves the sight support -1:the' desired-amount, andthe scale A, which ishfrictionally mounted on the sight support,

' now readsin connection with the pointer C a 470 degrees.

To make thesecond adjustment, or" 580 degrees to the-right'ofthe firstposition of 470 degrees, the sight support is rotated by means of the head 7 on the hollow screw 8,

which translates the worm screw in an axial :d1rect1on, the screw sliding on the'shaft' B without-rotating! The rot'ation the head e .17 trrotates 'the f ring 11, carrying the indicator D. Within the meaning oi the appended claims, the ring D may be considered as mounted upon the base S since it does not move with the sight support but is operated independently by the lever and yoke members. I r V a It is obvious that certain minor changes might be made in the apparatus shown with out departing from the spirit of my invention, for instance, the ring A might be provided ivi-th r'ar trip device so that it would move only whole units at a time.

"l/Vhat- I claim as new and desire to secure by Letters Patent is: i v

1. In a device of the class described, a

base, a sight support rotatably mounted thereon, a ring adjustably' mounted on said ight support relative to said ring being provided with a double'scale, I

having a common starting point for two ad ustments, said base'an'd said slght support being provided with pointers cooperating" with saidscale, and means on said base for rotating said sightsupport relative to said base, said means being providedwith scales the units of which are fractions'ofthe units on thegfirst named scale. i

3; In a device of the class described, a

base,v a sight support rot'atably mounted thereon, a-ring' adjustably mountedxon said support, said ring being provided with a double scale, having a common starting point, saidbasea'nd sight support'being provided with pointers cooperating with said scale, and a plurality of'deviceson said base for independently rotating said sight, support. l j t 4. Ina device of the class described, abase,

a sight support rotatably mountedlthereon,

a ring adjustably mounted on said support, said ring being provided with *a 1 double scale, having a common starting point, said base and sight support beingprovided with pointers cooperating with saidscale,a plurality of devices on said base for independently rotating said sight support, said dc vices being provided withscales the units of which are rraetions of the units of the first named scale.

'5'. In a device of the class described, a base, a sigh-t support ,rotatably 'mounted thereon, a scale ringrotatably mounted on said sightsupport and provided with scales on the opposite edges thereof, said scales having a common 'st arting point for two ad ustments, 'asecond IlIigmOUiI ted on said base, said support and said second named In testimony whereof I have hereunto ring being provided with pointers to coopsigned my name in the presence of two witerate W1th said scales, means on said base nesses.

for rotating said sight support and said sec- ING- ALDO GASTIGLIONI. 5 0nd named ring together, and means for ro- Witnesses:

tating said sight support independently of EMILIO GALLIMBERTI,

said second named ring. LUIGI CORRADINO. 

